Buckle attaching machine



Dec, 9, 1941. A. J. LEWIS 2,265,607

BUCKLE ATTACHING MACHINE Filed Aug. 16, 19:57 5 Sheets-Sheet -1 ATTORNEYS.

Dec. 9, 1941. A. J. 'LEWlS 2,265,607

BUCKLE ATTACHING'MAGHINE Filed Aug. 16, 1957 .3 Sheets-Sheet 2 ATTORN EYS Dec. 9, 1941. A. J.-LEW|S BUCKLE ATTACHING MACHINE Filed Aug. 16, 1937 5 SheePs-Sheec 3 IN\?\TOR ATTORNEY Patented Dec. 9, 1941 BUCKLE ATTACHING MACHINE Arthur J. Lewis, Stratford, Conn., assignor to The Baird Machine Company, Bridgeport, Conn, a corporation of Connecticut Application August 16, 1937, Serial No. 159,373

18 Claims.

This invention relates to new and useful improvements in machine tools, the specific application of the invention as herein disclosed being a buckle attaching machine, but the principles are applicable to other specific applications.

An object of the invention is to provide a press including means whereby the press is tripped a plurality of times for each complete cycle of operation and each time the press is tripped a different operation is performed but with the same set of tools.

Other objects and advantages will become apparent from a consideration of the following detailed description taken in connection with the accompanying drawings wherein a satisfactory embodiment of the invention is shown. However, it is to be understood that the invention is not limited to the details disclosed but includes all such variations and modifications as fall within the spirit of the invention and the scope of the.

appended claims.

In the drawings:

Fig. 1 is a top plan view of a machine constructed according to the present invention;

Fig. 2 is a side elevational View thereof with parts broken away as along the line 22 of Fig.

Fig. 3 is an end view looking from the right in Fig. 1;

Fig. 4 is a sectional view as along the line 4-4 of Fig, 3;

Fig. 5 is a plan View of the parts shown in Fig. 4 but partly broken away;

Fig. 6 is a plan view on a reduced scale of a lower die member;

Fig. 7 is an end elevational view of such die;

Fig, 8 is an enlarged sectional view taken as along the line 8-'8 of Fig. 6;

Fig. 9 is a side elevational view of the lower die member, on the scale of Fig. 6, and showing parts of actuating means associated therewith;

Fig. 10 is a sectional view through the lower die member substantially on line lD-l of Fig. 11 showing the movable parts thereof in their positions at the end of the first operation and showing the buckle in its second position;

Fig. 11 is a plan view of Fig. 10;

Fig. 12 is a view similar to Fig. 10 but with the buckle in its third position and with the die and punch positioned as at the end of the second 7 operation, the section of the buckle being substantially on line l2-l2 of Fig. 13;

Fig. 13 is a plan view of the buckle and web as in Fig. 12;

Fig. 14 is a section showing the die and punch at the end of the third operation, the buckle being completely attached to the web, the action of the buckle being substantially on line l4|4 of Fig. 15; and

Fig. 15 is a plan view showing the buckle and web as in Fig. 14. As above suggested, the invention is here disclosed by way of example as embodied in a machine for attaching buckles to webs. The buckle generally designated I0 is of a type used on the shoulder straps of overalls and comprises a frame ll having a depending loop portion I2 provided with an opening I3 to receive a supporting button, and attached or intergal at one end with the frame is a center bar l4 having prongs IE to grip the free end of a shoulder strap and adapted to have its free end portion held in a closed position against a stop 16 by means of 2. lug I! on the frame. The details of the buckle ID are fully set forth in patent to Mosgrove No. 2,015,863 of October 1, 1935. v

The buckle I0 is applied to a web I8 by the machine generally designated 19 and comprising side frame members 20 and 2| in the rear end portions of which is rotatably mounted a shaft 22. Secured on such shaft between the frame members is a small pinion 23 having a laterally extending hub-like portion 24, and also about said shaft and engaging the end of said hub portion and maintaining the pinion in place adjacent the frame member 2| is a collar 25.

On shaft 22 laterally of the frame member 20 is a pulley and fly-wheel or driven member 26 freely turnable on the shaft and constantly driven from any suitable source of power in any suitable manner, as for example by a belt (not shown) working in the groove 21. The driven member 26 carries pins 28 rigid with the member and projecting laterally therefrom toward the frame member 20 and arranged quite closely adjacent the shaft 22. Said shaft in its portion between fram member 20 and driven member 26 is provided with a slot 29 through which extends a dog 30 having its ends projecting at opposite sides of the shaft and being pivoted intermediate its ends on a pin 3| securing it to the shaft.

The pins 28 and dog 30 comprise parts of a one revolution clutch comprising means whereby the member 26 may under the control of an operator be connected with the shaft 22 to impart a revolution thereto. A pin or plunger 32 located for longitudinal sliding movement in the shaft 22 has one end constantly bearing against the dog 30, and a coil spring 33 acting on said pin keeps it against the dog in such relation that the latter is being constantly urged about its pivot pin 3| in a direction to have its end portion 30a engaged by a pin 28 so that the dog and thus the shaft 22 will be carried with the member 26.

Trip means controlling movement of the dog 30 is mounted on the outer side of the frame member 20 and comprises a latch bar 34 pivotally mounted intermediate its ends as on a stud 35. A coil spring 36 is connected at its upper end to the inner end of the bar 34 and at its lower end is anchored as on a pin 31, and such spring tends to maintain the bar in the position shown in full lines in Fig. 4 and to return it to such position when moved therefrom, it being noted that the bar forwardly of thepivot 35=is normally against a stop pin 38.

Bar 34 at the forward sidezof pivot 35 has a notch or opening 39 extending vertically therethrough and opening through its side which is against the frame member 20. At its forward end such bar is provided with-.a-ca-m surface- 40 leading up to a shoulder 41. A pull bar 42 .extends through the notch 39 in latch bar 34:, and in its forward edge-such pull bar is cut away to provide a horizontal shoulder 43 normally over- ,lying the upper edge of the latch bar immediately forwardly of the notch 39. In its normal position the dog 30 is held out of the path of travel of the pins 28- since the lower portion 30b of said dog: has been moved against the cam sur- ;face-.40 ,rocking the other end portion 35a of the 7 .dogaway from the drivenmember- 26 and bringing the cammed-out end portion 38b of the dog against the shoulder 4;! of the latch bar as in Figs. 4 and 5.

- Through any suitablemeans as the rod 44 the pull bar 42- is connected with a treadle' or the like (not shown) and to have-the machine-function the operator working such treadle, causes bar 42 to be pulled downwardly thereby rocking latch bar 34 to the dotted line position of Fig; 4. This takes the shoulder-M- away from the portion 301) ofthe dog resting against such shoulder whereby the spring pressed pin 32 rocks the dog to carry one of its projecting end portions into the path of movement of a pin'28. Such pinengaging the dog, the dog and shaft22 are moved with the pin the shaft being rotatedin the direction of the arrow45 (Fig. 4). After a partial rotationofthe shaft projecting end 30b of the dog engages the pull bar 42 and forces it rear wardly'totheinclined dotted line position of Fig. nwhereupon the shoulder 43 is no longer over any part of the bar 34 and its spring 36 rocks such bar back to .normalposition. The bar 42 has an. elongated slot in which is a guide'and pivot pin 42b carried on-the frame, the bar being .held on the pin by suitable washers 42c and .cotter pins 42d. A spring 426 connected at one end to the bar and at the other end to the frame tendsto move the upper end of the bar to the right as viewed in Fig. 2. or to the left as viewed inF-ig. 4 about thepin 42b. as a pivot and thus t nds t shift s u d 43 to aposition toen a e over the top of lever. 40, r 1

. ,As theshaft completes Va-. -rev.olutionthe projectingend 39b of the dog rides on tothe cam surface. rocking the dog against the action of thespring pressed pin 32 thereby carrying the end30aof the dog out of thepath of movement of pins 28. Immediately upon leaving the cam surface 40 thepr jecting end 3012 of thedog en gages the shOulder 4| of the bar 34'whereby the machine is. stopped. Thus the shaft canmake only one revolution on each tripping of catch or lever 34, even though the operator may hold the treadle and bar 42 depressed after tripping the catch, and before the catch can be again tripped or released the treadle must be released and it and bar 42 be allowed to return to their normal position. To assist in stopping the shaft and prevent it turning backward on a rebound when the driving connection between it and the member 26 is broken and the dog comes against shoulder 4 I, a friction is maintained on the hublike extension 24 of the gear 23. This is accomplishedby means of a bracket 46 secured to the frame as by bolt 41 and carrying a pad of fric- 1tion material 48 urged against the hub 24 as by l5 spring 49. The friction may be adjusted by adjusting bolt 41.

The frame side members. 26 and 2| mount a second shaft 50 located forwardly of the shaft 22 and having secured thereto a large pinion 5| meshingwith the pinion 23. In the present embodiment the ratio between pinions 23 and 5| is such that pinion 23 makes three complete revolutions for each complete revolution of the pin.-

ion 5| as there are three distinct. operations in the present cycle, but the ratio may be varied depending .on the number of operations to be performed in a cycle. Shaft 59 carries cams 52 and.53' which being rotated withthe shaft serve to operate tools as will later be described.

Mounted on the forward portion of the machine frame is a lower die 54 secured in place as with a machine screw 54a and comprising .a body or die block 55 having a vertical opening 56 therethrough toward its rear edge and through At its upper which is operable a plunger 51.

end plunger 5! has a work engaging portion, 58

in the present instance forming a lifter for the center bar of the buckle, and intermediate its ends the plunger is provided with an elongated recess 59 into which extends the end of a bolt '60 limiting vertical movement of the plunger.; A coil spring 6l arranged between the lower side of the'body 55 and the head62 of the plunger serves to normally retain, the plunger in the retracted or lower position of Fig. 8 and tends to return it to such position when moved therefrom.

On the upper side of the body or die block 55 adjacent one edge thereof is secured, as by screws .63,v a member 64 providing a side wall and, at

right angles to such member there is secured a .stop 65 having overhanging lugs or fingers 66 for holding work as will appear, and on loosening of a screw 61 such stop 65'may be adjusted to accommodate the die to different sizes of work. A

holder or gate 63 forming a swinging latch is arranged on the upper side of the body 55, it being pivoted at 69 whereby to be movable from the full line to the dotted line position of Fig. 6. A spring 70 anchored to the body as by screw H and to a stud 72 fixed to the holder serves to keep such holder in the full line position of Fig.

6 and to return it thereto when moved therefrom;

Forwardly of the plunger opening 56 an anvil T3 is-provided onthe upper surface of the body 55, and at the forward end of such anvil at opposite. sides thereof openings are'provided for the accommodation of guide and locating pins 15, and such body is also provided, with an opening '16 for the accommodation of a safety device or stud 11.

Pinsfhi and stud T! are carried by a holder 18 including a cylindrical portion (Sand a head 89, the latter having a lip or undercut portion 8| 75 for the control of the 'holder'andth e pins as will appear. Here it is noted that stud 11 is secured in the holder by set screws or the like 82, whereby such stud is vertically adjustable with respect b the holder. For the accommodation of the holder the body 55 is provided with an enlarged chamber or recess 83 opening through the lower side of the body and in alignment with the opening 16 for the passage of the stud 11.

The upper tool or punch generally designated 84 is mounted on a head-like portion 85 of a lever pivoted at 86 and including a rearwardly extending arm 81 carrying a roller I01, the purpose for which will later be described. Head 85 is provided with a side recess 88 receiving a mounting block 89 of the punch, and such block is secured to the head as by screws 90 passing through elongated openings SI in the block whereby the latter may be adjusted vertically relative to the head 85. The work engaging portion of punch 84 is designated 92 and has a channel in its upper side receiving the lower edge portion of block 89, and it is pivoted to such lock on a pin 93. This pin is located toward the rear or inner nd of the portion 9.2 and a spring 94 in a recess in block 89 and acting against a pin 94a carried by member 92 keeps the portion 92 normally at an angle to the block 89, and in this connection it is noted that in the normal position of the head 85 the punch 84 is inclined with respect to the die 54. This pivotal mounting permits the punch to engage the work evenly throughout the length of the punch even though it moves in an are because it is carried by a lever pivoted at B8. A heavy coil spring 95 anchored at one end on a stud 95 on the head 85 and at its other end on a stud 91 rigid with the machine frame tends to retain the head in the position of Fig. 2 and to return it to such position when moved therefrom.

An arm 98 is arranged in the lower portion of the machine and is pivoted intermediate its ends at 99. It has a forward portion I08 extending under the die 54 and a rear portion IOI extending under the cam 53. The portion I8!) of the arm carries an adjustable screw I62 secured in adjusted position, as by nut I83, and located to engage the head 62 of plunger 51 and raise such plunger against the action of spring BI on operation of the arm, as will later more fully appear. Such portion of the arm also carries a threaded stud I64 held in desired relation to the arm, as by nut I05, and having a head I86 extending over the lip or undercut portion 8I of the head 88 of holder 18 as clearly shown in Figs. 2 and 9. With this construction it will be understood that the holder 18 together with the pins 15 and safety stud 11 will be moved in accordance with movement of the arm 98.

On the rear or inner end of the extension or arm 91 of the head 85 is a roller I01 constantly held against the cam 52 by the action of the spring 95. From this it will be apparent that as such cam 52 is rotated with the shaft 50, the arm 81 and head 85 will be rocked about the shaft 86 resulting in movement of the punch 84 toward and from the work.

The machine being constructed as described to apply a buckle I8 to a web I8 the operator slides a buckle on to the die 54 in such position that the prongs I of the center bar I4 of the buckle project upwardly. That is, the buckle is in an upside down position and its upper edge opposite the loop I2 is placed against the inner edge of member 64 and thetip of the loop portion I2 of the buckle is against the curved inner edge I88 of the latch or holder 68 when the buckle is initially placed on the die.

' The operator then pushes the buckle toward the stop 65 and the gate or latch 68 yields for this purpose due to its mounting on the pivot 69, and then as the tip of buckle portion I2 reaches the cutout I09 on the inner edge of such latch 68, the spring 10 moves the latch back to normal position with the tip of, buckle portion I2 extending under an overhanging lip portion 68a of the latch and fitted into the recess I89. When this occurs the inner end of the buckle passes under the overhanging lugs 66 on the stop 65.

The buckle is thus held by the lugs 66 and the latch 68 against upward movement off the die and by the member 64, stop 65, and latch 68 against lateral movement on the die and against movement out of the die due to the reception of the tip of its portion I2 in the recess or cutout I 89 in the latch 68. When thus positioned on the die the buckle has its center bar I4 located above the anvil 13 but with the rear portion of such center bar or the portion thereof attached to the frame II disposed above the opening 56 in which the plunger 51 operates.

The buckles as received have their center bars I4 substantially closed or substantially in the plane of the frame as shown in Fig. 8. After the buckle is placed in the holding die on the machine, the operator draws the pull bar 42 downwardly to trip the latch 34 whereupon one revolution is imparted to the shaft 22 in the direction of arrow II1 Fig. 2. Such shaft will have but one revolution imparted thereto irrespective of whether or not the operator holds the bar 42 down, since as above explained, during revolution of the shaft projecting end 3% of the dog 39 forces such bar to the inclined dotted line position of Fig. 4, whereupon the spring 36 may return the latch bar 34 to normal position to catch the dog 38 and release it from a pin 28 at the end of a revolution of shaft 22.

The revolution of shaft 22 results in a one-third revolution of shaft 50 in the direction of arrow H8 Fig. 2 and during such one-third revolution the high point H0 of cam 53 rides against the end portion I8I of the arm 98 shifting such end portion downwardly I 00 upwardly. Bolt I82 during such movement of bar 98 engages the plunger 51 and forces it upwardly whereby its portion 58 engages the center bar I4 of the buckle opening such center bar or bending it upwardly to the position of Fig. 10. As such one-third revolution of shaft 58 continues, the high point I II) of cam 53 rides off the end portion IOI of arm 98 and the spring 8| about the plunger retracts the latter to the position of Fig. 10 and rocks the forward end of the arm I downwardly.

As the plunger was elevated, so also was the holder 18 together with the guide and locating pins 15 and the safety stud 11. Such parts were elevated to the dot and dash line positions of Fig. 10, and as the plunger 51 was retracted by spring 6I the holder 18 and the parts thereon was also retracted since such holder is attached to the stud I04 as above explained. However, the holder 18 was not fully retracted since now the cam 53 is in the position of Fig. 2 with the portion IflI of arm 68 against the concentric portion III of the cam. This'maintains the holder 18 in position with the guide and locating pins 15 and the stud 11 projecting as in the full line positions of and rocking the end portion Ei'gs. 2; and. 10. This is. the: position of the parts at the end ofthefirstoperation: ofv the cycle.

'The; center bar of the buckle nowbeing; open the operator: moves the-web l8'laterally or edgewise passing: it under such guide bar as suggestedby arrow H59 Fig. 1-1 and bringing its outer edge to the inner; sides of the guide pins 15. as shown best in Figs. 10 andill'. These guide pins keep-theweb; from overlying thestop It so that later-when the center bar: ismovedx downwardly against said stop',.no portion of the web will inter-- vene. These.pins-'|5:also, act-as locating pins for the buckle asit'will beseen from Fig. 11 they are located at the inner edges of the side bars of the buckle frame,.andare also in the recesses Hm at the inner side of the outer end-bar of this frame. During: the described:v first one-third revolution of'shaft-illcam 52has of course. moved with such shaft, but during the 1-20-degree movement of the cam the roller 1 01 was-riding against the concentricportion 52a of the cam so that nomovement wasI impartedtov the lever: 31. This movement movescam' 53: through. the 120 degrees indicated by; arc. I14.

The next time'the machineis tripped,.shaft 50 is given another one-third revolution near the end'of'whi'chlthe cutout I I3 of cam.53 moves over the innerlend; of arm 98 whereby such arm may roclc an.additionaldistance about pivot'98 further lowering the and NHL and. drawing the guide pins 'l5 into: the. die 54.. During this same time cam 53*.is:moving through a second 120 degrees designated by-arc H52 in: Fig; 2. During this time a comparatively high. portion of the cam 52 indicat'edatiflbvpasses under'the roller I01 causing the-.head'85- to be, rocked about shaft 86 to. move thepunclrrflfi; toward: the buckle. Such movement carries the punch: into the position of. Fig. 12

'pressingon the: prongs l5 and pressing the center' bar ht ofthebuckle down on to the web 18 and: holdingfit; there. The prongs. [5, however, are notfbent'dowrron to the; bar and-the operator can now insert'the freeend l8a (Figs. 13 and 15) of web i8: under these prongsinto position for them bebenti down and clamped againstthe freeendiofitheweb-to secure it to the buckle. It is'nowiready-"forithe nextoperation; V

The next: time: the machine is tripped the portiorr of cam: 53 indicated, by the 120 degree are H 21passes over: the end'IO I ofi lever 98 permitting the pins 15 and-.Tl'tobewholly withdrawn into the die block: to the position of Fig 14 as this leverirides on u)- the concentric portion 5300f the cam; 'At' the same time the-highest portion 520 of cam- 52 moves'upunder the roller I01 causing" its end H6 under the prongs IE on. the center.

bar ofthe buckle as shown in Figs." 13 and 15, and as" indicated above. Therefore, during the final downward movements of thepunch 84 to the position of Fig. 14 (that is following the third tripping of'the machine) such punch clinches the prongs I5 onto the end" of the web. Also, this finalmovement of the punch results in the lug l-TbeingifOld'ed over onto the free end of center bar M'by'the recess 92a to lock such end of said bar= againstthestop w as shown. in Fig.1 14.

Should it" happen that the guide 'pins'have not beenretractedby action of spring 6| the-portion I20 iof the' punch will; asthepunch descends, en-

gage safety stud l1 and force it and -theguide the spring 95-acts-to raise the: head. and punch 84 to the original or starting position, and. also the high portion H0. of cam '53 moves down toward the inner. end. of arm 98 ready to engage the same. asithe first step; in. the nextcomplete cycle of operation of the machine- From the abovev itwill .be understood that for eaclr complete cycle of operation of the machine the latter is tripped three times and that each timeit is tripped, a: difiierent operation. is performed with the same set of tools. In the pres.- ent instance, since. there are three. operations to: be performed, the gearing between the shafts 2-2 and 5B is in-such ratio thatshaft 22 completes three revolutions to one revolution. of' shaft- 50. That is, shaft 22 completes a revolution: for each operation: while shaft 5.0. makes. only a partial revolution (one-third revolution. in this case): for each operation and a complete revolution for each complete cycle. During the latter portion of the movement of shaft 50 on the third tripping of the machinathe punch 84 is being elevated and: the completed work may then. be removed from the die 54.

Having thus set, forth. the nature of my invention; what I. claim is:

1. In a press, a set of tools for performing a series of. successive operations on an article. and comprising certain tools for oneoperation and certaintools for another operatiommeans wherebythezpressis required to be tripped a plurality of times for each complete cycle of operation, a cam shaft, means whereby said camv shaft is given a partial revolution only each time the pressis tripped, camsron said. shaft, and means whereby said cams actuate said tools in groups to perform. a different operation eachtime; the pressis tripped during a complete cycle of operation of themachine, and said toolsbei-ng. constructed and arranged. to holdthe articleinone position. while the different operationsare: being performed.

2. In a press, means whereby the press is tripped a plurality of times-for each complete cycle of operation, a cam shaft, means whereby said cam shaft is-given apartialre'volution only each time the press is tripped, first and second tools,.a pair of cams on said. shaft, means where.- by on initial. tripping: of the press at the beginning'of a cycle of operation one. of. said cams causes operationof the first. tool, means. whereby on: the second tripping of the. press the second cam causes operation of the second tool to and hOlds' it in a new position, and. meanswhereby on the third tripping of themes the second cam imparts further movement to. thesecondv tool.

In a machineof; thecharacter described, a shaft, a driven member, means operable to con nectsaid shaft andfmember. to have the: former driven. by the; latter, means to. automatically release said first means on the shaftcompleting arevolution, a second-shaft,. gearing betimen saidshafts'; in such ratio that: a. revolution of the first shaft causesonly a partial revolution of the second mentioned. shaft, a. pair of tools adaptedfor performing different 7 operationsv on an articlesheld in one position, apair of cams on said second, shaft, and. means. whereby said'ftoo'ls are actuated in. predetermined. order by said cams toner-form said. operations while the article operations while the article is in said position,

a second shaft, a driven member, a one-revolution clutch for connecting said second shaft with said driven member, means for automatically disconnecting said clutch at the end of each revolution, and said shaft being geared to said cam shaft in such ratio that while the cam shaft .makes one revolution for the whole series of said operations the second shaft makes a revolution for each of said operations.

5. In a press, a set of tools for performing a series of different operations in predetermined order on an article held in one position and for each complete cycle of operation of the press,

rotatable means operable during a single complete revolution for actuating said tools to perform all of said operations while the article is held in said position, a. shaft, a driven member, a one revolution clutch for connecting said shaft with said member, means for automatically disconnecting the clutch at the end of each revolution, and said rotatable means being backgeared to said shaft in such ratio that while such means makes one complete revolution during the performance of said operations by the tools said shaft makes a revolution for each of said operations.

6. In a machine for attaching to a Web a buckle comprising a frame, a center bar having open prongs along its length and attached at one end to the frame, and a lug on the frame for anchoring to the other end of said bar, a die to receive and hold said buckle, a punch movable toward and from the buckle on the die, a plunger in the die, means whereby the machine is started and stopped three times during each complete cycle of operation, cam means, means whereby on the first starting of the machine the cam means actuates said plunger and the latter engages and opens said center bar for the insertion of a web laterally thereunder, means whereby on the second starting of the machine the cam means actuates the punch to have it move the center bar to closed position, and means whereby on the third starting of said machine the cam means actuates the punch to close said lug and said prongs.

7. In a machine for attaching to a web a buckle comprising a frame, a center bar having open prongs along its length and attached at one end to the frame, and a lug on the frame for anchoring the other end of said bar, a die to receive and hold said buckle, a punch movable toward and from the buckle on the die, a plunger in the die, and means whereby during a complete cycle of operation of said machine said plunger is actuated to engage and open the center bar of said buckle for the insertion of a web laterally thereunder, and the punch is actuated to move the center bar to closed position and then to close said lug and said prongs.

8. In a machine for attaching to a web a buckle comprising a frame, a center bar having open prongs along its length and attached at one end to the frame, and a lug on the frame for anchoring the other end of said bar, a die to receive-and hold said buckle, a punch movable toward and from the buckle on the die, a plunger in the die, means whereby on initial operation of said machine said plunger is actuated to engage and open said center bar of the buckle for the insertion of a web laterally thereunder, means to then retract said plunger, and means whereby on continued operation of the machine the punch is actuated to move said center bar to closed position and then to close said lug and said prongs.

9. In a machine for attaching to a web a buckle comprising a frame, a center bar having open prongs along its length and attached at one end to the frame, and a lug on the frame for anchoring the other end of said bar, a die to receive and hold said buckle, a punch movable toward and from the buckle on said die, a plunger in the die, means whereby during a complete cycle of operation of said machine said plunger is actuated to engage and open the center bar positions.

10. In a machine for attaching to a web a buckle comprising a frame, a center bar attached at one end to the frame and having open prongs along its length, and a lug on the frame for anchoring the other end of said bar, a die to receive and hold said buckle, a punch movable toward and from the buckle on said die, a plunger in the die, means whereby on initial operation of said machine said plunger is actuated to engage and open said center bar of the buckle for the insertion of a web laterally thereunder, means whereby on continued operation of the machine the punch is actuated to move said center bar to closed position and then to close said lug and said prongs, and means to thereafter raise said punch off the buckle.

11. In a machine for attaching to a web a buckle comprising a frame, a center bar attached at one end to the frame and having open prongs along its length, and a lug on the frame for anchoring the other end of said bar, a die to receive and hold said buckle, a punch, means pivotally mounting said punch for movement toward and from a buckle on the die, a plunger in the die, means whereby on initial operation of said machine, said plunger is actuated to engage and open said center bar for the insertion of a web laterally thereunder, and means whereby on continued operation of the machine the punch is rocked on its pivotal mountings to engage and close said center bar and then to close said lug and said prongs.

12. In a machine for attaching to a web a buckle comprising a frame, a center bar attached at one end to the frame and having open prongs along its length, and a lug on the frame for anchoring the other end of said bar, a die to receive and hold said buckle, a punch, means mounting said punch for movement toward and from a buckle on the die, a plunger in the die, guide pins movable through said die, means whereby on initial operation of said machine said plunger is actuated to engage and open said center bar for the insertion of a web laterally thereunder and said guide pins are projected to extend through the buckle frame and maintain an edge of the web away from said lug, and

means whereby on confinu'e'd operation of the machine theguide pins are withdrawn into the die and the punch is moved to engage and close the center'bar and then to close said lug onthe free'end of the center bar and clinch said prongs.

13'. In a machine for attaching to a web a buckle'comprisin'g a frame, a center bar attached at one end to the frame and having open prongs along its length, and a lug on the frame for anchoring the other end of said bar, a die to receive and hold said buckle, apunch, means mounting said punch for movement toward and from the die, a plunger in the die, guide pins movable through the die, means whereby on initial operationof said machine said plunger isactuated to engage and open said center bar for the insertion of a web laterally thereunder and said guide pins" are projected to extend through the buckleframe and maintain an edge of the Web away from said lug, means whereby on continued operation of the machine the guide pins-are withdrawn into the die and the punchis moved to engageand close the center bar and then to close said lug on the free end of the center bar and clinch said prongs, and a stud fixed with respect to said guide pins and arranged in the path of movement of said punch whereby should said guide pins stick said punch will engage said stud and force said pins back into the die;

141-111 a' machine for attaching to a web a buckle comprising a frame, a center bar attached atone end to the frame and having open prongs-"along its length, and a lug on the frame for anchoring the other end of said bar, a die to receive and hold said buckle, a punch, means mounting said punch for movement toward and fromthe die, a plunger in the die, guide pins movable through the die, a rockable arm, means to' rock said arm on initialoperation of the machine, said arm mounted to actuate said plunger to engage and open said center bar for the insertion of a web laterally thereunden said arm connected with said guide pins to simultaneously with the actuation of the plunger shift said pins to positions extending through the buckle frame and maintaining the web away from said lug, spring means normally tending to retract the plunger and thereby rock said arm in the opposite direction andretract the guide pins into "thedie, and meanswhereby on continued operation-of the machine said spring is permitted to so act and the punch is moved to engage and "close thecenter bar and then to close said lug on the-free endof the centerbar and clinch said prongs.

151 In a machine for attaching to aweb a buckle comprising'a frame; a center bar attached at one end to the frame and having open prongs along its length, and a lug on the frame for anchoring the other end of said bar, a die to receive and hold said buckle, said die including an anvil portion below said center bar when the buckle is on the die, a punch movable toward and from the-die, a plunger in the die, and means whereby during a complete cycle of operation of said machine the plunger is actuated to engage and open the center bar of the buckle for the insertion of a weblaterally under said bar, and the punch is actuated to move the center bar toclosed position and then'to close said lug and clinch said prongs while the center bar is supported by said anvil.

'16; A die for holding a bucklein a press comprising a body, a wall projecting above a surface of said body, a stopprojecting above said surfaceand' at right angles to said wall, ears on said step and under which an edge of a buckle may pass, a holder on said surface, means pivoting said holder to said body for swinging movement in a direction away from said wall, a spring resis'ting such movement of the holder but permitting the same to yield on insertion of a buckle-onto the die, and said holder including a portion to overlie an edge of a buckle on the 17. In a press, a set of tools for performing a series of successive operations on an article while held in a given position, means whereby'the press is tripped a; plurality of times for each complete cycle of operation, a cam shaft, means whereby said cam shaft is automatically given a partial revolution only each time the press is tripped, cams on said shaft, and means whereby said cams actuate difierent groups of said tools at different parts of the cycle of operation to have them perform a different operation each time the press is tripped during a complete cycle. 18. In a machine tool, a plurality of tools adapted to perform a series of difierent operations in succession on a piece of work during a given cycle and while said piece is held in one position, a cam shaft, cams on the shaft for operating said tools in difierent groups during difie'rent' parts of a single revolution of said 

